I do have it and it indicates I do have satellite service:
Too bad I can't easily upload a screenshot here, so I had to OCR it:
T-Mobile -> Satellite -> Satellite connectivity:
Section: About satellite connectivity
You can send and receive text messages over satellite with an eligible T-Mobile account
Section: Your T-Mobile account
✓ Messaging is included with your account
✓ Use of supported apps is included with your account
Section: How it works
When you don’t have a mobile or Wi-Fi network
▲ Your phone will auto-connect to a satellite. For the best connection, keep a clear view of the sky.
After your phone connects to a satellite
📡 You can text anyone, including emergency services, and use supported apps. Your phone will reconnect to a mobile network when available.
Section: Supported apps on your phone
(With navigation arrows and dots indicating a carousel or list)
Supported apps on your phone:
WhatsApp
Maps (Google)
Google Play services
Messages (Google)
AllTrails
(these are the ones I have installed)